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MHT CET2010PhysicsElectromagnetic Induction

When a rod of length l is rotated with angular velocity of in a perpendicular field of induction B , about one end, the emf across its ends is

Options

  1. AB l²
  2. BB l² 2
  3. CBl
  4. DB l 2

Correct answer

B. B l² 2

Step-by-step solution

A conducting rod of length l whose one end is fixed, is rotated about the axis passing through its fixed end and perpendicular to its length with constant angular velocity . Magnetic field (B) is perpendicular to the plane of the paper. Emf induced across the ends of the rod is e=B A n array l =B l² n = B l² T = 1 2 B l² array

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